Improvement in resawing-machines



'2S-heet -Sheeti. E.BENIAMIN. Re-Sawing Machine. No. 165,436. PatentedJuly 13,1875.

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UNITED STATES PATENT Orrron.

EDVVIN'BENJAMIN, OF CHICAGO, ILLINOIS.

IMPROVEMENT IN RESAWlNG-MACHINES.

Specification forming part of Letters Patent No. 165,436, dated Ju y 13,1875; application filed December 19, 1874.

To all whom it may concern:

Be it known that I, EDWIN BENJAMIN, of the city of Chicago, in thecounty of Cook and State of Illinois, have invented a new and usefulImprovement, in Resawing-Machines, of which the following is aspecification:

The nature of the present invention consists in the combination of afriction backgear with the feed-gear and an internal gear, whereby stuffto be resawed may be run rapidly back from the saw in case of accidentor otherwise, a lever attachment being used to reverse the feed or takeoff the feed at will.

In the drawing, Figure l is an elevation of a resawing-machine embodyingmy invention 5 Fig. 2, a sectional elevation thereof on line :10 m, Fig.1, looking in the direction indicated by dart 2; Fig. 3, Sheet 2, a topor plan view of the improved machine.

A B represent a substantial frame of suitable form, for supporting themechanism shown and hereinafter described. 0 D E F is the tilting frame,which supports the feed-rollers G and their attaching-plate H. The meansfor hanging this frame to the supportingframe A consist of elbows I J,which turn on pivot-bolts K K when operated upon by an adjustingscrew,L, so as to give to the feedrollers G any desired pitch relative to theplane of the saw M.

I do not claim to have invented the tilting frame, but conline myself tothe means described and shown for hanging it.

N represents a shaft, which is supported by a box, P, atone end, and bya box, Q, at the other. The box Q is cast solid to or is a part of aplate, R, and supports a bearing, S, for receiving the pivot of acog-gear, T. The plate R supports bearings U of a cog-gear, WV, aud isarranged, by means of one or more slots and bolts, V, to have a shortvertical reciprocating movement for reversing the feed, as hereinafterdescribed. The shaft N supports a friction-pulley, a, and a banddrivepulley, O, and the shaft of the cog -gear W supports afriction-pulley, 11, Figs. 1 and 2. 0 represents an external andinternal friction- Wheel, which is. hung in bearings e e in the tiltingframe O'D E F, and supports a bevelgear, f, meshing into a spur-wheel,g, which, by means of cog-gear h i j, drives the feedrollers G. Theshaft of the wheel 9 is supported by a sliding table, k, which isarranged to be moved to or from the saw M, the long.

bevelgear f permitting the spur-wheel g to move some little distancewithout slipping the gear when in use. On the top of the bed part G isattached a standard, Z, to which is pivoted a lever, m, provided with aconnecting plate or rod, n, which is pivoted to the bearing Q of theshaft N, and the lever is provided with an arm, 1, which is weighted tobring the friction-pulley a on the periphery of the wheel 0.

The arrangement of this lever and gearing is such thatwhen the weight 2controls the lever the pulley a drives the wheel 0 in the properdirection to feed stuff to the saw M, and when the lever m is moved backit operates to bring the friction-pulley 1), Figs. 1 and 2, against theinternal periphery of the wheel 0. The feed-rollers G will be turnedrapidly back, and carry a board from the saw.

By giving the lever on a medium position the wheel 0 will run withoutturning either of the pulleys c b. The pulley b, in practice, maybelarger than the pulley a, so that the backward movement of the rollers Gmay be the quickest.

To bring the feed-rollers G to any desired angle relative to the planeof the saw a collar, 3, is placed on a shaft, 4, which is provided witha spring, 5, placed between the collar and, one of the bearings, 6, ofshaft 4., so that the collar may yield and allow the rollers G to permituneven stuff to be fed to the saw without injury to the machinery. Theshaft 4 enters the bearing 6 by means gt a screw-thread, so that byturning the thumbnut or wheel 7 the collar 3, fitting in the bedplate H,will swing the plate on its axis, which is the shaft of spur-wheel g.The saw is driven by means 'of a band on pulley 9, in the ordinarymanner, and the wheel 0 is driven by a band running from the wheel 10 onthe same shaft as the wheel or pulley 9.

I here state that resawing-muchines are old combination with thefriction-rollers a I), wheel and well known; therefore 1 confine myselfto 0, pulley O, slotted plate R, and gear 1 9 W f, thepen-tsend'eoinbinationsclaimed. as and for the purpose set forth. 7

I have described mechanism which in some Signed the 15th day ofDecember, 1874. respects is old, better to enable a machine to be built.EDWIN BENJAMIN.

I claim as new and desire to secure by Let- Wiinesses:

ters Patent- JOHN H. ELLIOTT,

The lever m, with its weighted 21-11111, in G. L. OHAPIN.

